After reading this thread
, I decided to give Seafoam a try. The procedure went well and I got lots of smoke. Now my check engine light is flashing code 0301 - cyl 1 misfire. I just replaced plugs and wires about a year ago. Should I pull the plug and check for anything?
And the Seafoam can says guaranteed or money back, whats the process of getting my money back from them?